Solve the problem.List all the combinations of 4 objects 1, 2, 3, and 4 taken 3 at a time. What is C(4, 3)?
A. 123, 124, 134, 234
C(4, 3) = 4
B. 123, 124, 134, 234, 321, 432
C(4, 3) = 6
C. 123, 124, 132, 134, 142, 143, 213, 214, 231, 234, 241, 243, 312, 314, 321, 324, 341, 342, 412, 413, 421, 423, 431, 432
C(4, 3) = 24
D. 111, 112, 113, 114, 121, 122, 123, 124, 131, 132, 133, 134, 141, 142, 143, 144, 211, 212, 213, 214, 221, 222, 223, 224, 231, 232, 233, 234, 241, 242, 243, 244, 311, 312, 313, 314, 321, 322, 323, 324, 331, 332, 333, 334, 341, 342, 343, 344, 411, 412, 413, 414, 421, 422, 423, 424, 431, 432, 433, 434, 441, 442, 443, 444
C(4, 3) = 64
Answer: A
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Solve the equation.
= 1 - 
A. {1, 5} B. ? C. {0, 7} D. {0, -5}
Graph the ellipse and locate the foci.
+ 
= 1 
A. foci at (2
, 0) and (-2
, 0)
B. foci at (3, 0) and (-3, 0)
C. foci at (0, 7) and (0, -7)
D. foci at (0, 3) and (0, -3)
Test the equation for symmetry with respect to the given axis, line, or pole.r = 3 - 3 cos ?;
polar axis
A. has symmetry with respect to the polar axis B. may or may not have symmetry with respect to the polar axis
Subtract.
- 
A. 1
B. - 4
C. - 2
D. - 2